Paris climate deal must be legally binding, EU tells John Kerry

US warned that any agreement in Paris will be enshrined in law after secretary of state said it would 'definitively' not be a treaty

The EU has warned the Obama administration that a global climate deal at the Paris summit must be legally binding, after the US secretary of state John Kerry said that it "definitively" would not be a treaty.

"The Paris agreement must be an international legally binding agreement," a spokeswoman for the EU's climate commissioner, Miguel Arias Canete , told the Guardian. "The title of the agreement is yet to be decided but it will not affect its legally binding form."